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David, it says it has the exact same swappable barrel system as the 455 which is to 22 Magnum or .17HMR Barrel. https://www.opticsplanet.com/cz-usa-455-american-barrel-set.html

22 mag and 17 HMR

Availble barrels are 22Lr, 22wmr, and 17hmr Available here https://www.opticsplanet.com/cz-usa-455-american-barrel-set.html